30181120 has 144 divisors (see below), whose sum is σ = 81678240. Its totient is φ = 10616832.

The previous prime is 30181117. The next prime is 30181127. The reversal of 30181120 is 2118103.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 30181094 and 30181103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30181127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413404 + ... + 413476.

It is an arithmetic number, because the mean of its divisors is an integer number (567210).

Almost surely, 2^30181120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30181120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40839120).

30181120 is an abundant number, since it is smaller than the sum of its proper divisors (51497120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30181120 is a wasteful number, since it uses less digits than its factorization.

30181120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 30181120 is about 5493.7346131753. The cubic root of 30181120 is about 311.3473096705.

Adding to 30181120 its reverse (2118103), we get a palindrome (32299223).

The spelling of 30181120 in words is "thirty million, one hundred eighty-one thousand, one hundred twenty".